Dishwashing machine



Oct; 30, 1928.

, C. A. JOHNSON DISYHWASHING MACHINE Filed May 20, 1925 5 Sheets-Sheet a vmwa rl/Il'lldflilllllllfllll'llllllflll II}!! VI!!! Mfaeadea Oct. 30, 1928'.

C. A. JOHNSON DISHWASHING MACHINE Filed May 20, 1925 5 Sheets-Sheet 4 5 Sheets-Sheet 5 c. A. JOVHNSON File? May 20, 1925 DISHWASHING MACHINE Oct. 30, 1928.

' attczmq Patented Oct. 30, 1928.

UNITED STATES CHARLES A. JOHNSON, or sAoRAMEnToQ CALIFORNIA.

nIsnWAsHI G MACHINE;

. Application filed May 20, 1925. .Serial No. 31,648.

This invention appertains to a novel machine for washing dishes and the like and the primary object of. the present invention 'is to provide a machine embodying a pair of relativelylong rotating brushes extending the full length of the machine andnovel means for conveying the articles to be washed between. the brushes, the brushes being of such a length as toinsure the proper cleaning of the dishes. v 7

Another object of the invention is to provide oppositely rotating brushes extending the full length of the washing machine dis posed at an angle to the horizontal and an endless conveyor for carrying the'dishes be tween the brushes and for gradually carryingthe dishes fromout of the cleansing fluid to a point above the same, the angle and length of the brushes insuring the positive cleaning of the dishesjover, the entire area thereof irrespective of the size of the dishes.

A further object of the invention is to provide a dish washing machine embodying a movable frame supporting a suitable tank or tub for receiving the cleansing fluid with ineans for maintaining the fluid in a hotconrlition, the tank or tub having mounted directly therein a'conveyor for the dishes and the cleaning brushes.

A further object of the invention isto pro-' vide a novel brush arranged atone end of the tub and between thelongitudinally eX- tending brushes for cleaning the interior and exterior of glasses, cups and the like."

A further object of the invention is to provide novel means for guiding the cupcleaning brush during the rotation thereof, so as to insure the effective cleaning of the said cups and glasses. l

A further obj ect of the invention is the provision ofnovel means for synchronously rotating the longitudinally extending brushes, the cup and glass washing brush and the conveyor from a prime mover mounted uponthe frame of themachine below the tanker tub. v v

A still further object of the invention is to provide a novel dish washer of the above claimed, and illustrated in the accompanying draw ngs, in which drawings:

Figure 1 1S aside elevation of the improved dish washing machine showing the covers in their open extended position for supporting the soiled dishes atone end and the clean dish es at the other end,

Figure 2 is an end elevation offthe im proved machine, 1 1 I Figure 3 is a similar View looking from the opposite end of the machine, A I

Figure 4 is a fragmentary longitudinal sec 'on through'the machine showing one end the-1 eof with the cover in its openextended position to form the shelf,

Figure 5 is a similar View showing the opposite end of the, machine with its cover in an extended position to form the shelf, Q i

' Figure 6 is a fragmentary-end elevation of the improved machine with the cover in its open extended position and in section, illustrating the novel means for detachably holding the longitudinal brushes in position and the support therefor,

Figure 7 is a transverse section through the improved machine illustrating the novel means for operating the longitudinally extending brushes and the cup and glass wash ing brush, the longitudinally extending brushes beingremoved to facilitate the un-. derstanding of the drive,

Figure 8 is an enlarged detail section throughtheoperating means for the cup and glasswashing brush, the manipulating and guide handle for the brush being shown removed from the shank,

Figure 9 is a detail fragmentary transverse section through the machine illustrating the drive for the conveyor,

Figure 10 18 an enlarged for one of the longitudinally extending brushes,

a Figure 11 is a detail transverse section illustrating the means for operating the drive chain from the limlley wheel.

Referring to the drawings in detail, where in similar reference characters designate corresponding parts throughout the several views, the letter A generally indicates the ime proved dish washing machine, which com prises a frame 10, for supporting the tub or. tank 15 for receiving the dishes to be washed. The frame 10 .comprises corner standards 11 preferably formed of angle iron, with the flanges disposed inwardly. These corner detail section showing the drive forone of the stub shafts Ill) standards jll can be braeedin any desired I way and are connected adjacent to their lower terminals by longitudinally extending side bars 12 which'can be also forxned of angle iron. The legs are also connected by end transverse angle bars 13 andtheptransverseand longitudinally extending angle bars 13 and 12 can support suitable brackets and the like for receiving various operating parts of then' achine. If desired one ofthe longitudinally extending ba'rs12 can be set ini'va'rdof the corner legseis clearly shown in- Figure 7 o'f the drawings, ino'rderto l'orm a *more ellicient slipport' for various parts oi the device. 1

The tank or tub 15 can be made of-sheet meta-1 and-is received between the flanges of the corner standards 10 adjacent to the upper side-thereofi and s'e'curedthereto by the use of suitable bolts or the like 16. The upperjedge or thetub' can be braced by relatively I light angle-bars 17 if desired. The tub or tank 15 adj acent to'one end can be provided withan outlet pipe 18 in ordertofacilitate-the draining of thecleaning fluid from thetub after the washing opefat'ibn'and this outlet pipe 18 can have incorporatedin the length thereof a suitableglobe valife or the like 19'to control the flow ofwaterfiherethrough. 'T'he tubis adapted to'ha've the dishes introduced into the same at'oneendthereof and-the opposite end has the-*endwall '20 thereof t'ermin ating short of the top of the side walls 21 in order to facilitate theremoval ofthe dishes from the tub. The longitudinal and outer transverse edges of the cover plates'22'an'd 23 are preferably rolled 'as at 28 and a suitable reinforcingwire can be provided'for the rolled edge thereof. 'Tliese cover plates are of sucha size as to completely overlie the upper sideofthe tub and to meet atthe' transverse centeithereof. When the'co'ver 22*is swung to its open positionat rightangles to the end wall which carries the same; the-said cover plate is adapted to forinashelf or support for the soiled dishes prior to the introduction of the same in the Inachinean'd in order to hold the cover plate 22 .in an extended position, the outer face thereof is provided with brackets 2.) which areadapted to' be engaged by a swinging bracket Ocarried by the adjacent corner standard. The swinging bracket 30 is of 'a substantially U-shape'and the connecting porti'on'thereofis adapted to engage said bracket 7 29. When thecoverplate is in itsnormal 1 position over the tub the bracket 30 can be swung toalower positionas shown in Figure 3 of the drawings. 7

v The outerqface of the cover plate 23 carries suitable brackets 31. and these brackets extend the swinging section 26 and are adapted to engage SflrltlSBCtlOIl when the cover plate 23 1s in its open extendedposition at ri ht angles to 'beyondthe e 'dge of -the cover plate adjacent to i the wall 20. The opposite tei-i'ninals of'theposition-similar to the swinging bracket 30,

as shown in Figure 2 ofthe drawings The coverplate 23 and the swinging section" 26 constitute agshelf, when in their extended position for supperting the clean'fdishes as the sameare brou'ght from outof the tub.

'- Arranged longitudinally within the tub or tank 15 isanendless conveyor-' for the dishes and this conveyor-- is arranged at an angleto i the horizontal with its highest end terminatingsli-ghtly above the upper edge of the end wall 20, so as tofacilitate the delivering'of' the' washed dishes to the swinging section 26 and thefoover plate 23. Said endless conveyo'r'35 einbodies'parallel sprocket chains 36 which-are trained over sprocket wheels 37 w liieh are keyed or otherwisesecured to transversely=extendingshafts 38 and 39; The sprocket "chains 36 are connectedby trans verse flights-or cleats40 and every other flight V or cleat 40 can be provided'w ith a rubber-"or other friction pad 41' for insuring thecarryin'gof the dishes through the tub or tank.

In order to ho'ld' the endless conveyor :in

proper position a supporting frame 42 is arranged directly within the tub or tank 15 and this sup-porting frame 42 includesinclined longitudin ally extending angle barstii vi/hi ch can 'be 'bolte-d =tosidewa lls2l of the tub. The

lower terminals of theangle bars 43 canbe t connected together by ajcross angle bar 44. The longlti'idinallyextending angle bar's 43-of the supporting name-2 carrysuitable bear- 7 ings for receiv-ingthe shafts 38 an'd'39 and as is clearly shown in F-igur e 9 the shaft'39 has one endtliereof extended threugh one of the side-wa'lls'21of the'tub into a gear casing 45 which is'utilizedfor housing-a drive IDCOllEE nisin for the sai'd%shaft;as will behereinafter more fully described. *The tub or tank 16' is adapted to be *fill'ed with water charged with soap up to tvlie'de'sired'level; which can be ust below the sha t 39of'the'endless conveyor 85.

If preferredthe'sidebarslfi of the fraine42 can be braced by a transverse strip 46 as shown inFigure-eof the drawings.

tien'of the tub and terini'nates short of the side The en'd- V lesscon'veyor is'ari'an'ged in fthe'central porwalls thereof and suitable hinged "covers 47 and 48 can be connected to the sidewalls of the tub or to the bars 43 of the frame 42 for engaging'the longitudinaledges of theupper run of the endless conveyor; These plates can be swung to their raised positions so as to permit theinterior of the tub to bereadily transverse angle'bar 51'is arranged in spaced parallel relation to one ofthe end angle bars 13 and the motor is bolted to said bar 51 and ad acent end angle bar 13. The armature shaft 52 of the motor is provided with a rela' tively small pulley wheel 53 which is in direct ahnement with a relatively'large drive pulley wheel 54, which is keyed or otherwise secured c to a transversely extending shaft 55 carried by brackets 56 secured. onthe longitudinally extending beams '12. These pulley wheels 53 and 54 havetrained about the same a drive pulley belt 57- for transmitting motion from the motorto said shaft 55. The shaft has keyed or otherwise secured thereto a sprocket "WllQQl 58whichisdisposed in thelower end of the-gear casing 45. This sprocket wheel is in ahnement with a relatively large sprocket wheel 59keyedor otherwise se cured tothe shaft 39 of the endless conveyor;

' 80, which are fitted against the arms 79 and A suitable sprocket chain 60 is housed within the casing 45 and is trained'about the sprocket wheels 58 and 59 and itisobvious from this construction that theconveyor will be driven directly from the motor. The conveyor is operated in such a manner, that the upper run thereof will move toward the end wall 20, so as to deliver the dishes onto the swinging section 26 and the cover Section 23. Arranged longitudinally within the tub or tank 15 are the cleaning brushes 61 and 62 and these brushes extend the full length of the conveyor belt and are arranged at the sameangle to the horizontal as said belt. The

brushes are arranged in parallel. relation and in relatively close proximity so that the tuftsthereof will engage during the rot-ation of the brushes and these brushes are adapted to r0- tate in opposite directions, by means-which will be hereinafter more fully described. These brushes are mounted in a novel manner so that the same can be removed from the tank without difficulty and thus permit the. ready cleaning thereof as is clearly shown inFigure '10. Thelowerends of the brushes? carry suitable sockets 63 which are of *a: polygonal configuration in cross section and. these sockets are adapted to be re'movably. fitted upon polygonal stub shafts 64, which arerotatably carried by bearings 65 sup ported on transversely extending brackets 66 which can be bolted or otherwise secured to the side bars 43 of thesupporting frame '42.

Suitable stop collars 67 are keyed or otherwise secured to the stub shafts 64 for engag ing'the bearings 65 in orderto prevent longitudinal movement of thesaid shaftsin the bearings. uTheopposit-e ends of the shafts 64v have keyed ,or otherwise secured thereto beveled drive gears 68 which also engage be'are ings .65. These beveled gears 68 mesh with facing beveled gears 69, Which' are keyed or otherwise secured to a transversely extendingshaft 70 mounted'insuitable bearings '71.

These bearings 71 are'bolted to upright angle irons 72 which can be bolted'to the sides21 of the tub or tank 15-. The shaft 70 has keyed to the opposite end thereof sprocket wheels 73 and 74 and the sprocket wheel 7 3 is in alinement with a sprocket wheel 7 5 keysdmor otherwise secured to the lower shaft 38 of the endless conveyor 35. A suitable sprocket chain 7 6 is trained about the sprocket Wheels 7 3 and 7 5 and serves to drive the stub shafts 64 from the conveyor belt. The upper ends of the brushes are supported in a novel manner and the oppositeends of the brushes from the sockets 63 are provided withspindles '77 which are rotatably mounted in bearings T hese bearings 78 are removably carried by inwardly directed'arms 79, the lower terminals of which can be bolted to the side bars 43 of thesupporting frame 42. clearly shown in-Figures 6 and f the drawing, the bearings 78 are provided with legs suitable bolts and wing nuts 81 and 82 are It is obvious that when it is desiredto move the brushes 61 and 62 from the tub that it is merely necessary to unthread the nuts 82 from off of the bolts 81 and swing the legs 80 of the bearings 78 from out of engagement with the arms 7 9, after which the brushes can I be oulledoutwardly by sliding the sockets 63 roniofi' of the polygonal endsof the stub shafts 64.

Novel means has been provided for washing the interior-of cups and glasses and this means embodies a'swinging brush 85 which is of a convenient shape to be readily inserted in cups, glasses, bowls and the like. The brush 85 can be arranged at the inner ends of the brushes 61 and 62 and the upper endthereof carries a threaded socket 86 which is adapted to be threadedon a shank 87 carried by a head 88. -This head 88 is secured to a beveled drive" gear 89 as can be readily seen by referrlng to Figure 11 of the drawings. Arranged above the gear89 isa block 90, which is mountedfor swinging movement upon a cross shaft 91,

which is arranged above the shaft 70. i This shaft 91 is rotatably carried bybearings 92 whichare bolted or otherwise secured to the upright angle bar-s72, which is also utilized for, carrying the bearings 71 as hereinbe'iore described. This shaftfil haskeyed or other; wise secured theretoa sprocket wheel 93 which is 'in' alinementwith the sprocket wheel 74 keyed tothe shaft and these sprocket wheels 7 4 and 93 have trained about the same adrive sprocket chain 94 -Whichserves to drive the shaft lufrointhe shaft 70. 'This block carries a depending rigidstub shaft 95011 which is rotatably mountedv the drive I beveled gear 89 hereinbefore mentioned. As

shovvntherigid-stub shaft 95- 'can have secured vthereto a collar whichisfitted within the head '88-and which engagesthe beveled gear 1 89 m hold the sa ine imposition. Thebeveled gear 89 is adapted to mesh with the drive b'evel gear 97 keyed I or otl'ierwise "secured to the shaft '91 and it can be seen that the brush '85" will be drivenvfrom the shaft 91 irrespec ti-ve'of-the position' th'ere'of relative to the brushesfil and 62; In'ord'er to-tlacilitatethe swinging of the block 90'to changethe angle I ,ofthe brnsh85, so that the sam-ecanbe readily r snitable supports 104, which can be bolted to thesuppmting'frame10; One-end: of the inserted cup or glass, the upper face of the block which -'-is diametrically opposite the rigidstirs shaft 95 is provided with a. shank 98 011 whl'chc'an-be reinova bly fitted a niiinipulat'inghandle 99. 1 c ,c A sheet metal shield 100- isprovided atthc end of the tub or tank which carries the-brush 85hr protecting the'user ofthe brush from coming in contact with the sprocket chain-94, shaft 9 1 and other operating parts of the device and this'shiel'd 1'00 canbe secured tothe side walls 15,the adj ac'ent end wallsof the'tub an'd to the upright supporting angle bars 72.

The shield is providedwith 's-uit ableopenings 101 andf102 through which the shank-'98 and 1 brush 85 are adapted to'protrude.

In order tomaint'ain thecleaning fliiid in the tank ortub in a warm condition a gas burner, or any desiredhharaoter; 103 is. ar-

ranged below the tankand is in'cmnted upon burner 103 "is provided-with a control cock 104 s and a suitable flexible gas tube 105 is adapted to be connected therewith. This tube can I lead to any suitable source of gas silpply.

In operation of the ln'iproved dish washing machine; the desired 'quanti'tyot water and soap is placed in the tank, and the covers 22" and 23 are arranged as shown in Figure 1 oi the drawings. The dishes to be washed are placed upon'the'cover 22 and are introduced one'at a time between thebrushes '61 and (32 at the lowermost end thereof. The conveyor belt drawsthe dishes through the Water and be;

tween the, oppositely'rotating brushes 61 and 62"w'hich effectively cleans'the dishes "of all the grease. As the di's'hes are brought 'to' the" 7 top surface of the water by 'the beltthesame are grasped and placed u'pon th'e cover 2-3 of the swin'g'ingsection-26 to drainl Whencups,

bowls or glasses-are to be washed, the handle 99 is placedon' the shank98, and the hrus'h fi is swung to a raised position and'placed' with" in th'e'cup oreglass to be washed; ,,The-,rot,atio1n of this brush will effectively elean the interior 7U of the bowl for ell-p atter whit-h the same can be placed upon the conveyor belt which! will draw the same between thebr-ushes Gland- 62 V and deposit the said cup or bowl, on the-shelf 26. During the dish washing operation; the

gas burner 103 can be utilizedif so desired and when; the dishes have been washed. it is merely. necessary to plj'acea bulehet under the outlet pipe 18 and allow the Water to'dra-in from thetub into the bucket'by turning olf Changes in details maybe made without departing from the spirit or thescopeofthis invention, but r V .7

\VhatI claim as new is:

1.' A dish washing machine comprising a fraine, a liquid container-mountedupon "the frame, rotatable parallel brushes disposed in the container and incontaot with oneanother, and means cooperating with the-brushes for c-arryingrthe'; dishes to'be washedfion edge thro ighthe tub and between the brushesl v2.9A-dis-h washingmachine comprising a fluid container,- a pair of parallel brushes arranged in the container 1 at an angle to the horizontal and gradually leading toward the JUN upper edge of th'econtainer', means for rotat ingthe brushes inopp'osite directions, and means for conveying thedishesto' be.=vvashed through the icleaning fluid in the container and between 'the'brushes, thehrush'es'being 7 arranged incontact forsupporting. the dishes on'ed'ge upon the conveyin means;

3. A dish washing mac ine comprising'a container, 21 shaft, means *for rotating the shaft, a block'roc'kabl mounted upon the shaft, a stub shaftjrigid ycarried'by'therock able laloek,a head rotatably niounted upon the stab she-rt, a-brush secured to the head' and means forrotating the head froin said first shaft irrespective of thep'osi tion ofjthebl'oek upon the-said shaft. I 1 v 4.111 a dish washing machine, a cleaning flii'id container, 'a pa ir of oppositely rotatable longitudinally extending brushes disposed Withinthecontainer, -pintles carried by one of theends of 'the brushes, the oppositeends of the brushes having sockets; transverselyjex v tending brackets disposed within the contamer adjacent to one-end thereof, hearings mounted upon the brackets-stub shafts rotat a ly mounted within the V bearings provided with polygonal inner ends adapted to fit within the sockets carfriedby the "brnshes,'upright standards'in the casing,' atransv-ersely extending shaft rotata'bly carried by the standards, means for operating the shaft, facing bevel gears on said transversely extending shaft, bevel gearson said stub shafts meshing with the facing bevel gears, and means dotachably and rotatably receiving the pintles of the brushes.

5. In a dish Washing machine, a cleaning fluid container, a pair of longitudinally extending brushes disposed in the container,

pintles carried by theuppermost ends of the brushes, the lowermost ends of the brushes having sockets, inwardly extending arms arranged at one, end of the container, detachable bearings secured to the arms for rotatably receiving the pintles, transversely extending brackets arranged adjacent to the other end of the container, bearings secured to the brackets, stub shafts rotatably mounted in the last mentioned bearings provided with polygonal inner ends for detachably fitting in the sockets, a transverse shaft, means for rotating the stub shafts and the transverse shaft, a motor, and means for operating the transverse shaft from the motor.

In testimonywhereof "I aflin my signature;

' CHARLES A .JOHNSON. 

